PT-2026-121900
CVE-2026-98928
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Published
2026-10-23
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Updated
2026-10-23
Description by
Score
N/A
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In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: Derive GUEST HAS SVE from the SVE feature bit at EL2
pkvm init features from host() takes KVM ARCH FLAG GUEST HAS SVE and
KVM ARM VCPU SVE from the host separately, but pkvm vcpu init sve()
tests the bit while vcpu has sve() reads the flag. A host that sets the
flag without the bit gets a vCPU with a NULL sve state that the world
switch loads the guest's SVE state from.
Derive the flag from the bit, and drop the protected path's copy of the
host's flag, which is dead code since protected VMs are not allowed SVE.
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